Question about 2001 Oldsmobile Aurora

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My electric system has gone haywire. The tach

My electric system has gone haywire. The tach goes up to 8000 RPM but the engine doesn't race. The biggest problem I have is that the gas tank won't open now. Is there another way to open the tank?

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  • yadayada
    yadayada May 11, 2010

    HAYWIRE, THAT IS RIGHT THERE WITH NINGCONBOB

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SOME GAS CAPS CAN BE VERY HARD TO REMOVE , IF YOU TRY WITH A PAIR OF LONG PLIERS YOU SHOULD BE ABLE TO REMOVE. THE TACH PROBLEM SOUNDS LIKE THE SPEED SENSOR MAY BE BAD

Posted on Sep 28, 2009

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99 Isuzu Trooper RPM keeps racing! These sensors have been replaced; TPS, IAC, CTS, no Vac. leak. The RPM still races at normal operating temp. What sensor tells the computer the RPM of the engine?


redux1
after many posts, we see only 1 clue engine
MAF
the 6ve1 engine
that told me what engines. one word, mAF.
if just one MAF (no map)
so all air leaks are slow rpm caused by lean
but if pcm goes in to limp home mode.
it car race, due to loss of IAC controls
the engine does not run like you think
the CMP/Cke sensors,
if they die , the engine dies.
if they misfire, the engine misfires and slows and stalls'

are you using good scan tools real that see all factory codes. p1, p2xxx?
not just fedcodes, p0xxx?

the 3.5v v6 has a MAP and a MAF BOTH.
on some engines like this, the Map is for idle
and the mAF of for fast.
fooling many machanics
dual mode systems,
the MAF sensor is not very accurate at idle
is the reason for the dual mod
so vacuum leaks, I SAY.

Mar 01, 2017 | Isuzu Cars & Trucks

1 Answer

The rpm keeps going up like I am in overdrive and the engine sounds like it racing


I had the same issue in my truck.My transmissions electrical system was fried & 2nd-3rd gear was gone completely. Had to swap transmissions altogether. Take it to a transmission shop & get it checked out before making any repairs.

Jul 21, 2013 | Cars & Trucks

1 Answer

Roaring in the front end of my 2004 Chevy Trailblazer 4x4


A jet engine type of noise from the engine area usually means the fan clutch is going bad. I don't think the tach is related to this, that could be the stepper motor for the tach going bad.

Dec 29, 2012 | 2004 Chevrolet TrailBlazer

1 Answer

1998 dodge 2500 4x4 pickup speedo and tach problems


You just go to the link I attached I'm sure you will get the solution of your problem
1998 Dodge Caravan Service Repair Factory Manual INSTANT DOWNLOAD

Dec 08, 2017 | 1999 Dodge Ram 2500 4WD

1 Answer

When I accelerate the car jerks and the tachometer tops out at 8000 rpm even though the engine is not racing. when I accelerate the tachometer goes down to 7000 rpm. I have to shut the car off to reset...


i had a 2001 aurora with the same exact problem. lucky for me a drunk driver smashed into it with a plow truck and it tumbled down a cliff into a river while it was parked and they gave me 12k for the car that i paid 8900 for .
i beilive its and ignition problem

Sep 29, 2010 | 2001 Oldsmobile Aurora

1 Answer

Tach. drop's to zero while driving 70 ?


I have had the almost same problem twice. A 'thump', like the engine missed a fire and tach drops. Seems OK after restart. Electrical? Timing chain slip?
Has 135,000 mile. Any clues?

May 15, 2010 | 1997 Buick Park Avenue

1 Answer

I have a 1996 F150 4x4 with a 5 liter/302 engine, manual tramsmission. When I push the clutch in to shift the engine races and the tach goes up then after a few minutes it will idle down. I have replaced...


Check the PCV valve and the PCV hose where the elbow is near the TB. It may be stuck open and the hose may have a crack, Squeeze it while engine is running. Also are you sure its not brake related. The check valve on the booster can fail. Does the RPM change when you apply just the brake ??
Also spray some brake cleaner around the base of the TB looking for a RPM increase. Spray around any vacuum source.

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2 Answers

75vette tack stuck at max rpm, both with engine on


Chances are its not the Tach. Look over the wiring to the tach. Its it brittle about to crust off? Is it shorted to ground? Now that would pin it. Check its connections off the coil. Engine side of this item is usually where you'll find the problem. This is nothing new with a vette definately not serious. Remember the tach responds to electrical signal it gets. Before you do the surgery on the gauge itself make sure nothing is shorting this out.

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1 Answer

Tach crazy trunk pops dosn't like to start


Hello, I have found that if the car shows any sign of a dead battery like a slow crank it will pop the trunk. I dont know why they do this but mine did the same thing when the battery was bad

Jan 09, 2009 | 2000 Oldsmobile Alero

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